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Kagome metals as quantum materials

Abstract:  I will discuss progress in the study of classes of metals built from kagome lattices or networks of corner sharing triangles.  The electronic band structures of these compounds are known to host a series of features such as Dirac crossings, saddle points, and flat bands at select carrier fillings.  Tuning the electron filing about these features has the potential to stabilize a variety of exotic electronic states such as orbital magnetism, bond density wave order, and unconventional superconductivity; however experimental realization of these states has been a historical challenge.  A number of new compounds built from kagome lattices with band fillings near each of these features have been discovered recently, and I will provide an overview of progress in studying their anomalous properties.  Particular focus will be given to electronic instabilities realized in kagome metals with their Fermi levels close to the saddle points in their band structures. 

Current research interests include studies of new states and phase behaviors across a broad array of quantum materials and harnessing many-body electronic states in functional materials. Specific examples include studies of strongly spin orbit coupled Mott materials, unconventional superconductivity, quantum criticality, quantum magnetism, and correlated topological materials. Experimental techniques include neutron and synchrotron x-ray scattering, bulk electronic properties characterization (e.g. charge transport, heat capacity, magnetic susceptibility, etc.), and new bulk single crystal growth methods.

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